10. bag of words1.2 Supervised M achine Learn
I am a Nigerian
prince writing
to you about an
inheritance...
...
dinner
about
prince
call
...
work
nigerian
yesterday
office
inheritance
...
...
0
1
1
0
...
0
1
0
0
1
...
Figure 1.4: The (binary) Bag-of-Words (BoW) representation.
11. special considerations for the case
of systematic reviews
• class imbalance – far fewer relevant than
irrelevant abstracts
– asymmetric costs sensitivity more important than
specificity
• reviewer time is scarce and expensive
– better models, fewer labels: active learning and
dual supervision
12. how do we do?
“Towards Modernizing the Systematic Review Pipeline: Efficient Updating via Data Mining”
Genetics in Medicine 2012